Hello Floyd Lau:
The PN532 is supported by open source tools Linux NFC and libnfc, which are not developed and not supported by NXP. You can find more information and examples about these tools on some communities in the web.
You may consider to use the PN7120, which is a complete NFC Controller solution which is supported by the libnfc-nci Linux stack. Please take a look at the AN11697 application note (PN7120 Linux Software Stack Integration Guidelines):
http://www.nxp.com/documents/application_note/AN11697.pdf
And the next document in this community may also be interesting for you:
NFC PN7120 on the i.MX6Q
I hope this helps.
Regards!
Jorge Gonzalez
